(1) Dismantling and disassembling operations must be ca […]
(1) Dismantling and disassembling operations must be carried out after confirming that the pressure on the upstream and downstream pipes of the ball valve has been relieved.
(2) Non-metal parts should be removed from the cleaning agent immediately after cleaning, and should not be soaked for a long time.
(3) The bolts on the flange must be tightened symmetrically, gradually and evenly during assembly.
(4) The cleaning agent should be compatible with rubber parts, plastic parts, metal parts and working medium (such as gas) in the ball valve. When the working medium is gas, gasoline (GB484-89) can be used to clean metal parts. Non-metal parts should be cleaned with pure water or alcohol.
(5) Each single ball valve part disassembled can be cleaned by dipping. Metal parts with non-decomposed non-metal parts can be scrubbed with clean and fine silk cloth impregnated with cleaning agent (to prevent the fibers from falling off and sticking to the parts). When cleaning, all grease, dirt, glue, dust, etc. that adhere to the wall must be removed.
(6) When disassembling and reassembling the ball valve, care must be taken to prevent damage to the sealing surfaces of the parts, especially non-metal parts. Special tools should be used when removing the O-rings.
(7) After cleaning, it is necessary to assemble after the volatilization of the wall cleaning agent is cleaned (it can be wiped with silk cloth not impregnated with the cleaning agent), but it must not be left for a long time, otherwise it will rust and be polluted by dust.
(8) New parts should also be cleaned before assembly.
(9) Lubricate with grease. The grease should be compatible with the ball valve metal materials, rubber parts, plastic parts and working medium. When the working medium is gas, for example, special 221 grease can be used. Apply a thin layer of grease to the surface of the seal mounting groove, apply a thin layer of grease to the rubber seal, and apply a thin layer of grease to the sealing and friction surfaces of the valve stem.
(10) Metal fragments, fibers, grease (except those specified for use) shall not be allowed to contaminate, adhere or stay on the surface of parts or enter the cavity during assembly.